AC/Accessory Problem

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=737
Printed Date: July 12, 2025 at 10:34 AM

Topic: AC/Accessory Problem

Posted By: fishscale
Subject: AC/Accessory Problem
Date Posted: May 12, 2002 at 11:11 PM

Hi, I am a somewhat trained installer who no longer practices autosound/secutity but does another long, tiring, and relentless career.

Anyway, I have an older vehicle, 1983 Ford Crown Victoria, and decided that I wanted remote start; I installed a Viper 550 and have had no problems, with the exception of the a/c and accessory outputs. AS you may or may not know, there are two accessory wires at the ignition, both being gray / YELLOW and differeing only in gauge. Naturaly, both wires were hooked up to the acc output of the alarm, but when remote start is activated, the a/c, as well as the dash gauges will not power up. The blower for the ac/heater works fine, the vehicle starts yet no ac. Might anyone be able to tell me which wire I could tap to power up the ac and dash? Im sure I could easily test for the wires, but my time is very limited and any help would be oh-so appreciated. Thank you!!!

David

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David

Replies:

Posted By: Velocity Motors
Date Posted: May 13, 2002 at 5:11 AM

So your a teacher now eh ?? posted_image

Some Ford vehicles are equipped with Heater/AC blower motors which draw large amounts of current. These vehicles are equipped with three Ignition 2 wires. Two of these are very thick (12 gauge). The other wire is a smaller 16 gauge. All of these wires are ‘hot’ (+12 volts) in the run position only. You will need to hook up a relay in this configuration:
- 87 - GRAY / YELLOW 12 gauge wires from FORD vehicle
- 85 - Primary Ignition output from remote starter
- 86 + 30 - 12 volts constant ( FUSED 20 amps )
- 87a - NOT USED
- CONNECT 16 GAUGE 2nd IGNITION WIRE TO 2nd IGNITION WIRE OF REMOTE STARTER
Note: Thin 16 gauge wire will be either Pink/Black or Gray / YELLOW
Thick wires will be either Gray / YELLOW or BLACK/ Lt. Green

Please test all wires and verify circuits before installing into the vehicle. This information was was taken from another installation site , so please make sure you test to ensure proper outputs of each wires.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: fishscale
Date Posted: May 18, 2002 at 11:20 PM

Thanks Jeff,

I beleive I have the problem under control, I took your advice and a little common sense and derrived a solution that works just fine....

Thanks again man, really appreciate your help

David

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David

Posted By: Velocity Motors
Date Posted: May 18, 2002 at 11:56 PM

Good to hear and your welcome.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA